Equalizing and by-pass valve.



*No. 736,302. PATENTED AUG.11, 1903.

E. SARVER.

EQUALIZING AND BY PASS VALVE.

APPLIOATION EILED JUNE 28, 1902.

N0 MODEL.

m: numus rcrzas co Moraumn. msummnm EDWARD SARVER,

iatented August 11, .1903

PATENT OFFICE.

'OF OGDEN, UTAH.

EQUALI ZING AND BY -PASS VALVE.

SPECIFICATION forming part of Letters Patent No. 736,362, dated August 11, 1903.

Application filed June 28, 1902.

' compression which occurs in expansion. or

compound steam-engines when the engine is working under steam-pressure and to so construct the same that the valve acts as a bypass valve when the engine is drifting.

not shown in the drawings.

In the accompanying drawings, Figure l is a sectional View of an engine-cylinder with its piston and myinvention applied thereto. The steam-chest is of the ordinary form,which forms no .part of my invention, and thus it is Fig. 2 is an en-' larged sectional view of my improved equalizing and by-pass valve. Fig. 3 is a sectional view of an engine-cylinder, showing my invention applied thereto by casting the enginecylinder with the passage-ways and the sup port and seats for the equalizing and by-pass valves.

It is Well known by those skilled in the art that in expansion or compound engines,

. whether of thestationary, marine, orlocomoof the cylinder are the passage-ways 2 and 3. Situated in the passage-ways and adapted to control them. is my improved equalizing and by-pass valve, which I will presently explain.

In Fig. 1, I show the passageways 2 and 3 and the equalizing and by-pass valve located outside of the body of the cylinder. How- Serial No. 118.676. (No model.)

ever, it will be readily understood that these passage-ways and the support and seats for the valves maybe cast in the wall of the cylinder, as shown in Fig. 3, without departing in any sense from the spirit and scope of my invention.

My improved equalizing and by-pass valve 5 is suitably supported and guided by the walls 6, the walls or guides 6 being supported through the medium of suitable webs or spiders 7. This construction forms a passageway around the valve 5 and its supporting or guiding walls 6. The passage-ways 2' and 3 at the point where the valve is situated are preferably enlarged, as shown, and at the end of this enlargement the valve-seats 8 and 9 are provided. The opposite ends of the valve 5 are so shaped as tocoact with the seats 8 and 9 in a manner to form a steamtight joint when one or the other end of the valve 5 is in engagement with either of the aforementioned valve-seats.

. The valve 5 has a longitudinal movement through its support or guide 6, and for the purpose of causing a frictional action between the valve and its support I provide any suitable form of frictional packing 10. This frictional packing or ring 10 will create a sufficient amount of friction to require about one pound of pressure to move the valve in its support or guideway 6.

The operation of myinvention is as follows: The piston being driven in one direction through the medium of the steam, the steam driving the piston-rushes through the passage-way 2' and strikes the valve5 with such velocity that it causes its opposite end to engage its seat and to prevent the passage of the steam around the valve, with which it makes a steam-tight joint. The valve remains in this position until the piston of the engine has moved sufficiently far to create compression equal to one pound greater than the pressure at the opposite side of the valve 5, which moves the valve in the opposite direction to theposition shown in Fig.2. 'When in this position, the compression, is released and passes to the opposite end of the cylinder, and consequently to the opposite side of the piston, by passing around the valve 5, as will be readily understood. When the engine is drifting, the valve will remain in the central position, (shown in Fig. 2,) making a perfect bypass valve and permitting the air compressed at opposite ends of the cylinder to freely pass from one end of the cylinder to the opposite with great advantage to an engine to which it is attached whether it be simple or compound, locomotive, marine, or stationary.

While I here show a reciprocating valve and a packing to cause frictional contact for the purpose heretofore explained, it will be readily understood that any other form of valve adapted to act as the friction-ring acts in the construction here shown will be within do not, therefore, limit the scope of my in vention to the specific construction herein shown and described, since various modifications of the principle and operation therein involved will occur to those skilled in this art.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. An engine-cylinder havingapassage-way in direct communication with opposite ends thereof, an equalizing-valve situated in said passage-way and adapted to be closed by pressure from either end of thecylinder.

2. An engine-cylinderhavingapassage-way in direct communication with opposite ends thereof, a reciprocating valve located in said passage-way and adapted to be closed by the pressure from either end of the cylinder.

in direct communication with opposite ends thereof, a valve situated within the passageway intermediate its ends and adapted to be closed by pressure passing through-the passage-way in opposite directions and to permit a passage of the pressure from either end of the cylinder to the opposite end, and means for resisting the movement of the valve in either direction.

4. An engine-cylinder having a passageway connecting opposite ends thereof, a valve located within the passage-way, the passageway having the valve-seat adjacent opposite sides of the valve, and passage-ways around the valve, and means for resisting the movement of the valve in both directions toward either of the said valve-seats, substantially as described. J

5. An engine-cylinder having a passageway connecting opposite ends thereof, the passage-way having an intermediate enlargement, the opposite ends of the enlargement provided with valve-seats, a valve-support within the enlargement, the enlargement having passage-ways around the said support, a valve located within the support and adapted to be actuated and caused to engage respectively, the said valve-seats, according to the direction of the pressure passing through the passage-way, and means for resisting the movement of the valve in both directions, substantially as described. 7 6. An engine-cylinder having a passagethe scope and spirit of my invention, and I 3. An engine-cylinder having a passage-way way connecting opposite ends thereof, the passage-way having an intermediate enlargement, valve-seats located at opposite ends of the enlargement, a longitudinally-extending valve-support within the enlargement, the enlargement constructed with passage-way around the valve-support, a reciprocating valve within the support adapted to coact respectively with the said valve-seatsfor interrupting the communication when moved in either direction, and to open the passageway when in its central position, and means for resisting the movement of the said valve.

7. An engine-cylinder having a passageway connecting opposite ends thereof, the passage-way having an intermediate enlargement, valve-seats locatedat opposite ends of the enlargement, a valve-support within the enlargement, the enlargement having pas sage-way around the support, a valve located in the support and shorter than the distance between the said valve-seats, whereby the movement of the valve in opposite directions, will respectively coact with the said valve seats for interrupting communication at opposite ends of the cylinder, substantially as described.

8. An engine-cylinder having a passageway connecting opposite ends thereof, the passage-way having an intermediate enlargement, valve-seats located at opposite ends of the enlargement, a longitudinally-extending valve-support within the enlargement, the enlargement constructed to have a passageway around the said support, areciprocating valve located within the support and shorter than the distance v between the said valveseats, andadapted to coact respectively therewith when moved in opposite directions, and a friction device between the valve and the said support, substantially as described.

9. An engine-cylinder having a passageway connecting opposite ends thereof, the passage-way having an intermediate enlargement, valve-seats located at opposite ends of the enlargement, a longitudinally-extending valve support stationarily held by a web within the enlargement, whereby a passage way is provided around said support, a reciprocating valve located within the support and shorter than the distance between the said val ve-seats, and adapted to coact respectively therewith when moved in opposite directions, and a friction device between the valve and. said support, substantially as described.

10. An engine-cylinder having a passageway connecting opposite ends thereof, the passage-way having an enlarged central portion, valve-seats located at opposite ends of the enlarged central portion, a centrally-l cated longitudinally extending valve support, a web supporting said valve-support, within the enlarged central portion, and a reciprocating valve within the support and shorter than the distance between the said valve-seats, substantially as described.

11. An engine-cylinder having a passageway in direct communication with the oppositeendsthereof, a reciprocating valve situated in said passage-way and adapted to be closed by pressure on the ends thereof through the said passage-way from either end of the cylinder;

13. An engine-cylinder having a passageway connecting the opposite ends thereof and having an enlarged portion intermediate the ends, an equalizing-valve situated in said enlarged portion and adapted to be closed by pressure from either" end of the cylinder.

14. An engine-cylinder having a passageway connecting the opposite ends thereof and having an enlarged portion intermediate its ends, a reciprocating valve located in said enlarged portion and adapted to be closed by the pressure from either end of the cylinder.

15. An engine-cylinder having a passageway connecting opposite ends thereof, the passage-wayhaving an intermediate enlargement, valve-seats located at opposite ends of the enlargement, a longitudinally-ext-ending valve support stationarily held by a web within the enlargement whereby a passageway is provided around said support, a reciprocating valve located within the support and shorter than the distance between the said valve-seats and having concaved steam-engaging ends, and adapted to coact respectively therewith when moved in opposite directions, and a friction-packing carried by the valve adjacent the support.

16. An engine-cylinder having a passage way connecting opposite ends thereof, a valve located within the passage-way the passageway having the valve-seat adjacent opposite ends of the valve,'and passage-ways around said valves. 7

17. An engine-cylinder having a passageway connecting opposite ends thereof, valveseats located in said passage-Way, and a valve located between said seats and of a length less than the distance between said seats.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EDWARD SARVER.

Witnesses:

SANFORD L. IvEs, W. A. EAHEART. 

